Caverns
Pockets
Both words in one sentence
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He can replenish his air by sticking his head in various pockets of air contained in overturned barrels or underwater caverns, or by simply returning to the diving bell used to reach the sea floor.
Source: Oxygen Meter
Cite this Source
Pockets and Caverns. (2016). Retrieved 2026, August 13, from https://thesaurus.plus/related/caverns/pockets
Caverns & Pockets. N.p., 2016. Web. 13 Aug. 2026. <https://thesaurus.plus/related/caverns/pockets>.
Pockets or Caverns. 2016. Accessed August 13, 2026. https://thesaurus.plus/related/caverns/pockets.
Google Ngram Viewer shows how "caverns" and "pockets" have occurred on timeline